tomWright:So they are using MORE cells, less often, for shorter periods of time? Even if they are more efficient, how much per KWh does this thing cost?

Oh, and 20 times the electricity? I though solar cells broke the 6% efficiency barrier years ago. Either I misunderstand that, (possible), or the reporter is misstating something.

What reporter? It's phys.org; much of their content consists of press releases pitching products that will create power at a billion percent efficiency, cure cancer yesterday, and give everyone a puppy.